A security guard was killed after a gunman started shooting rounds at a German nightclub

A gunman opened fire at a packed nightclub Sunday in Germany, killing one employee and seriously wounding several others.

According to law enforcement officials, the gunman was the the disco operator's son-in-law. He'd left the club after engaging in an argument, returned with an assault rifle and started shooting just inside the club's entrance, killing a security guard.

The suspect was fatally shot by a police officer.

The suspect has been identified as a 34-year-old who came to Germany from Iraq in 1991 as a child. They said they had no details of the dispute, but ruled out terrorism.

Police said the man was the son-in-law of the club's operator and had a criminal record that included assault and drug-related convictions. The suspect was not named in keeping with German privacy laws.

An officer sustained non-life-threatening wounds and the gunman died later in a hospital.